Timeline for Var(XY), if X and Y are independent random variables [duplicate]
Current License: CC BY-SA 4.0
12 events
| when toggle format | what | by | license | comment | |
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| S Aug 31, 2021 at 23:39 | history | suggested | Shayan Shafiq |
Added a missing tag
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| Aug 31, 2021 at 19:21 | review | Suggested edits | |||
| S Aug 31, 2021 at 23:39 | |||||
| Mar 16, 2019 at 16:38 | history | closed |
Dilip Sarwate Michael R. Chernick whuber♦ distributions Users with the distributions badge or a synonym can single-handedly close distributions questions as duplicates and reopen them as needed. |
Duplicate of Variance of product of multiple independent random variables | |
| Mar 16, 2019 at 13:20 | review | Close votes | |||
| Mar 16, 2019 at 16:40 | |||||
| Mar 16, 2019 at 13:18 | comment | added | Glen_b | General product case here: stats.stackexchange.com/questions/52646/… (product of 2 is given in the question) | |
| Mar 16, 2019 at 11:48 | answer | added | Greenparker | timeline score: 13 | |
| Mar 16, 2019 at 11:25 | review | Low quality posts | |||
| Mar 16, 2019 at 11:34 | |||||
| Mar 16, 2019 at 11:24 | comment | added | Henry | If $X$ and $Y$ are independent then $X^2$ and $Y^2$ are also independent and $E[X^2Y^2]=E[X^2]E[Y^2]$ | |
| Mar 16, 2019 at 11:22 | comment | added | Dev | No sir. I know Var(XY)= E(X^2 Y^2)- (E(XY))^2 and E(XY)= E(X) E(Y) as X, Y are independent but no idea about X^2 and Y^2 are independent or not. | |
| Mar 16, 2019 at 11:12 | comment | added | Henry | Do you have any thoughts about this yourself? $\text{Var}(X)\text{Var}(Y)$ would be wrong - consider an almost surely constant non-zero $X$ | |
| Mar 16, 2019 at 11:10 | review | First posts | |||
| Mar 16, 2019 at 13:49 | |||||
| Mar 16, 2019 at 11:09 | history | asked | Dev | CC BY-SA 4.0 |